Biomedical subjects

N Jausovec

Publications and source records attributed to N Jausovec.

6 recordsLinked to original sources

PubMed2001

Differences in event-related and induced EEG patterns in the theta and alpha frequency bands related to human emotional intelligence.

High (emotional intelligence scores (EIQ)=120) and average emotional intelligent individuals (EIQ=89) were solving tasks from an emotional intelligence test while their electroencephalogram was recorded. Significant differences relating to emotional intelligence were observed in induced and event related band power in the theta (4.4-6.4 Hz), lower-2 alpha (8.4-10.4 Hz), and upper alpha band (10.4-12.4 Hz). High emotional intelligent individuals displayed less desynchronization in the upper alpha band, as well as more left hemispheric theta desynchronization. Further a significant positive correlation between the mean frequency and emotional intelligence was observed. The results are similar to those reported for verbal and performance components of general intelligence.

Alpha Rhythm↗

PubMed2001

Differences in EEG current density related to intelligence.

Differences in current density between high intelligent (IQ=127), and low intelligent individuals (IQ=87), while solving two oddball tasks (auditive and visual) were analyzed with low resolution brain electromagnetic tomography (LORETA). In highly intelligent individuals a decrease in the volume of activated cortical gray matter between the P300 onset and the P300 peak amplitude was observed. The EEG of low intelligent individuals showed a reverse pattern of cortical activity. In the auditive oddball task the decrease in the activated cortical volume in high intelligent individuals was accompanied by an increase in current density, and a more left hemispheric source location at maximum current density. The results suggest that high intelligent individuals more efficiently distributed their cognitive resources needed to cope with the oddball tasks.

Acoustic Stimulation↗

PubMed2000

Differences in event-related and induced brain oscillations in the theta and alpha frequency bands related to human intelligence.

High (intelligence quotient (IQ)=126) and low intelligent individuals (IQ=88) were listening to tone pips and performed an auditory oddball task while their electroencephalogram was recorded. Significant differences relating to intelligence were observed in induced and event related band power in the theta (4-7 Hz) and upper alpha band (10-13 Hz). In the oddball task high intelligent individuals displayed less theta synchronization and more synchronization in the upper alpha band. The results were explained by the more efficient engagement of neural networks in more intelligent individuals.

Adult↗

PubMed2000

EEG activity during the performance of complex mental problems.

This study investigated differences in cognitive processes related to problem complexity. It was assumed that these differences would be reflected in respondents' EEG activity--spectral power and coherence. A second issue of the study was to compare differences between the lower (alpha(1) = 7.9-10.0 Hz), and upper alpha band (alpha(2) = 10.1-12.9 Hz). In the first experiment two well-defined problems with two levels of complexity were used. Only minor differences in EEG power and coherence measures related to problem complexity were observed. In the second experiment divergent production problems resembling tasks on creativity tests were compared with dialectic problems calling for creative solutions. Differences in EEG power measures were mainly related to the form of problem presentation (figural/verbal). In contrast, coherence was related to the level of creativity needed to solve a problem. Noticeable increased intra- and interhemispheric cooperation between mainly the far distant brain regions was observed in the EEG activity of respondents while solving the dialectic problems. These results are explained by the more intense involvement of the long cortico-cortical fiber system in creative thinking. Differences between the lower and upper alpha band were significant for the power and coherence measures. In Experiment 2, fewer differences were observed in power measures in the upper alpha band than in the lower alpha band. A reverse pattern was observed for the coherence measures. These results hint to a functional independence of the two alpha bands, however, they do not allow to draw firm conclusions about their functional meanings. The study showed that it is unlikely that individuals solve well- and ill-defined problems by employing similar cognitive strategies.

Adolescent↗

PubMed2000

Correlations between ERP parameters and intelligence: a reconsideration.

The present study investigated differences in ERP parameters related to intelligence. For that purpose 74 individuals (Intelligence: M=107; S.D.=12; range 73-135), of average creativity passively listened to two tones and performed two auditory, and two visual oddball tasks while their EEG was recorded. The approximate entropy parameters, peak latencies and amplitudes were determined. The correlation coefficients indicated that in the attended conditions, the more intelligent individuals showed more regular ERP waveforms than less intelligent individuals. It was further found that less intelligent individuals showed increased P300 latencies and reduced amplitudes. The differences were explained with a more specific engagement of neural networks in more intelligent individuals.

Adolescent↗

PubMed2000

Differences in resting EEG related to ability.

The aim of the present study was to investigate the relationship between different EEG measures (mean power, mean frequency, approximated entropy and coherence), and ability (creativity and intelligence). For that purpose the EEG of 115 student-teachers (Intelligence: M= 115.17; SD = 12.78; IQ(min)= 82; IQ(max)= 136; Creativity - standardized scores: M = 55.97; SD = 10.67; C(min)= 38; C(max)= 84) was recorded while they were resting with eyes open and closed. The study showed only weak correlations between measures based on the level of activity in different areas (mean power, mean frequency and approximated entropy) and creativity. The correlations with IQ scores were even less pronounced. On the other hand, coherence measures showed a much more intense relationship both with creativity as well as with intelligence. In the eyes-open state these differences were mainly distributed over the right hemisphere. The results are discussed in the light of different theories relating brain functioning and ability.

Adult↗